MIRACLE is into manufacturing of complete Range of Laminated Transformers as well as Toroidal Transformers. MIRACLE offers Volume Controls are constructed with the help of 100V transformers. This control switch comes with 11 volume steps [10 regulator steps and 1-zero position] and besides this , they have a E/M relay [24VDC] which makes emergency announcements possible even if control is at position "0". These are offered in various models with voltage ranging from 25 W to 60 W.